Sampling issues: clarity about the source and representativeness of samples of evidence that your audience and you are using to form inferences and draw conclusions.
抽样问题：有关源和代表性样品的证据，你的听众和您使用的是形成清晰的推论并得出结论。
The authenticity and the representativeness of material sampling and Measuring on site directly influence the objectiveness and accuracy of the measured data and the result judgement.
施工现场材料取样和检验的真实性和代表性直接影响检测数据和结果判定的客观性和准确性。
The sampling representativeness is made based on the individual deviation of phosphate rock by statistical method.
采用统计方法，针对原料磷矿个体差异，解决磷矿采样的代表性。
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